<template>
<div class="tab-control">
    <div class="tab-control-item" :class="{active: currentIndex === index}" v-for="(title, index) in titles" @click="itemClick(index)" :key="index">
        <span>{{ title }}</span>
    </div>
</div>
</template>

<script>
export default {
    name: "TabControl",
    props: {
        titles: {
            type: Array,
            default: []
        }
    },
    data() {
        return {
            currentIndex: 0
        }
    },
    methods: {
        itemClick(index) {
            this.currentIndex = index

            // 2.发出事件
            this.$emit('itemClick', index)
        }
    }
}
</script>

<style scoped>
.tab-control {
    /*
    position:sticky;
    top:4px;
    */
    display: flex;
    text-align: center;
    line-height: 40px;
    font-size: 15px;
    background-color: #fff;
    z-index: 9;
}

.tab-control-item {
    flex: 1;
}

.tab-control-item span {
    padding: 5px;
}

.active {
    color: var(--color-high-text);
}

.active span {
    border-bottom: 2px solid var(--color-high-text);
}
</style>
